allis



(No Model.) 2 Sheets-Sheet 1. T. V. ALLIS. METHOD OF MAKING BARBEDFENCING.

N0. 507,198. Patented Oct. 24, 1893.

' INVENTUR:

WITNESSES: M05222.

his di y- UNITED STATES PATENT QFFlCE.

THOMAS V. ALLIS, OF NEW YORK, N. Y.

METHOD OF MAKING BARBED FENCING.

SPECIFICATION forming part of Letters Patent No. 507,198, dated October24, 1893.

Application filed April 11, 1889. Serial No. 3061758. (No specimens.)

To all whom it may concern.-

Be it known that I, THOMAS ,V. ALLIS, a citizen of the United States,residing at New York city, in the county and State of New York,haveinvented certain new and useful Improvements in Methods of Making BarbedFencing; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention is an improvement in the art of making barbed strips, thepurpose being mainly to produce from one blank, two plain fiat barbedstrips, having barbs projecting from one edge .in the plane of thestrip, at greater intervals apart than the width of a barb, and itconsists of the following mode of operation whereby through the makingof two other strips at the same time and from the same blank and havingbarbs that are produced so as to project laterally from the edge all thematerial of the blank is utilized in marketable product and certainwaste of ma terial and labor that it is impossible to avoid by makingonly the two first described strips from one blank is avoided and theeconomical advantage of making four strips with the same expenditure oftime and labor as in the making of two is secured all as hereinafterfully described reference being made to the accompanying drawings inwhich- Figure 1 is a side elevation of dies used in the first step of myimproved method with a blankstrip to be converted into four barbedstrips between them. Fig. 2 is a diagram showing the dies and strip ofFig. 1 in plan. Fig. 3 is a side elevation of diets used in the secondstep of the method,.and completing the operation, with the blank betweenthem. Fig. 4 is a diagram showing the dies and strip of Fig.3 in plan.Fig. 5 is a side elevation of one of the barbed strips produced. Fig. 6is a side elevation of another of said strips. Fig. 7 is a diagramshowing the same method of operations in the making of only'one of eachkind of barbed strips from a narrower blank as it may be practiced ifdesired.

The strips a, Figs. 1, 2 and 6, having integral barbs b, at intervalsalong one edge and in the plane of the strip represent the form ofbarbed strips which it is preferred to produce; such strips have beenlargely made heretofore but at the expense of considerable waste ofmaterial cut from between thebarbs in short pieces, two such stripsbeing made from one blank strip of suitable width for the purpose and socut that the barbs of one strip are produced from the middle portion ofthe blank midway between the barbs of the other strip, from which itwill be seen that to every barb on each strip there is a waste piece aswide as the length of the barb and nearly half the length of thedistance from one barb to another. Besides this waste of material thereis a waste of power and wear of dies in an amount of useless cuttingequal to half the total length of the edges of the Waste pieces.Practically the waste of material is about fifteen per cent. and it isalmost wholly useless for any other purpose, and the percentage of wasteof power and wear of dies is quite as much or more. To produce one striponly from a blank only wide enough for one strip there would be morethan double the amount of waste material. It will be seen that it isvery important to avoid these items of waste, and it will also be seenthat in the following improved method which I have contrived for theprod notion of other strips cZ, together with strips a, using a blanksomewhat wider than is necessary for the two strips a, Iavoid waste bothin material and in unnecessary cutting either altogether or very nearlyso. I take a blank strip e, of suitable width for producing the twostrips a, from the margins as clearly indicated in Fig. 2, and also forthe two other strips d, as indicated in Fig. 4:, and first outtherefrom, said strips (1, by a shear punch as f, working between thetwo coaoting bed cuttersg, both having the duplex cutting edges h, 1;,of which parts h, make the slits j, separating the strips a, with barbsb, from the remaining intermediate part Z, of the strip and at the sametime making the notches m, in the edges of part Z, from which the barbsare produced; and the parts i, of said edges make the short slits n,lengthwise in the part Z, of the strip each way from the bottoms of thenotches m, out of which the barbs are produced. The strips a, are thenseparated from the intermediate part Z, for subsequently twisting,crimping and otherwise finishing them, and the remaining strip 1 is thenfurther treated for prod ucing the othertwo strips (1, by trimming thecurved edges of notches m, as shown at 0, Fig. 4 to make sharper pointsof the barb spurs 70, produced on the margins of the strip Z, by theslits n. Said strip is also slitted at q, between and in line with theslits n, of each margin but not quite the whole distance between saidslits so as to leave the short uncut webs s, retaining the barbs inconnection with the strips. The barb spurs 7e, are also bent laterallyto the strip and in opposite directions; the strip is also split alongthe middle as at t, and thereby separated and a barbed strip (1,produced from each portion and finally the two strips cl are cri mped orcorrugated, preferably, with one crimp between the barbs, as at to, butthere may be more if preferred.

The, point trimming dies which it is preferred to use consist of theduplex bed die 1;, and the corresponding upper movable dies to; 00,represents bed dies and 11 a movable die for cutting slits q; .2represents clamping dies both of which are to be movable for closing onand holding the strip preparatory to bending the barbs k; a are benderswhich move after the clamps have closed and bend the barbs two at a timeon each margin of strip Z, and in opposite directions; I), slitting diesfor dividing the blank along the middle and separating the two barbedstrips (1, one from the other and c and d, crimping dies by which thestrips are crimped between the barbs.

The trimming of the points of the barb spurs is only essential in so faras it will generally be preferable to have the points sharper than theywould be without trimming them, and it will be omitted in some cases.

The slits q, are made to facilitate the subsequent twisting of the rodwhich, owing to the material dilference in width between the parts thusslitted and the alternate parts out of which the barbs are producedtwists unevenly, the slits very materially lessen the torsionalresistance of these wider parts, the two separatedmembers being free ofeach other so that they can stretch and otherwise shift separately underthe different stresses of twisting and thus enable the twist to besomewhat more uniform, but these slits may in some cases be omitted. Thecrimping may also be omitted as it is a matter of choice whether thestrips be crimped or not, but it will generally be included.

The bending dies and the crimping dies must open sufliciently forallowing the bent barbs to pass between them when the strip shifts alongin the feed movements. The slitting dies 1), may be narrow enough forthe barbs to pass each side of them, and the crimping dies must alsoopen enough to allow the bent barbs to pass, the strips being fedintermittingly the distance from center to center of the notches m, ateach operation of the dies, as this kind of machinery is generally madeto operate. It is to be understood that the apparatus shown anddescribed is only given as one example of apparatus that may be used,various other forms of contrivances being alike available for thepurpose, as, for instance, a pair of roll dies having the properlyshaped and suitably located cutters or dies on the faces may be used forcarrying out the whole process including the cutting of the strips 0.,or a series of pairs having the special dies for the several differentopera tions may be arranged in a gang successively to accomplish thewhole process at one pass of the strip.

The dies of Figs. 3 and 4 maybe differently organized for instance theslitting die I), may be located in advance of all the rest, the crimpingdies maybe so placed as to makethe crimps in the strips before thebending of the barbs.

The cutting dies may be organized in one machine, and the headers andcrimpers in another machine to each of which the strip or strips may befedseparately and various other modifications of the apparatus may beadopted.

Referring to Fig. 7 it will be seen that the same method is applicablefor making only two strips from a narrower blank, one of each kind a,and d, using only one range of the dies and dispensing with the slittingdies b, these latter dies being only required when the double ranges ofdies are employee as I have represented them in Figs. 1 to 4 inclusiveand which are of course preferred because of the greater amount ofproduct that may be turned out in a given time, but for working upnarrow strips which can sometimes be procured to advantage as comparedwith the wider strips, and particularly when a more accurately madehigher grade article is required, it will be preferred to use the singlerange of dies and make only the two strips as indicated in Fig. 7.

What I claim, and desire to secure by Letters Patent, is

1. The improvement in the art of making barbed fencing which consists ofcutting from the margin of a blank strip c,barbed strip at, having barbsb, at intervals along one edge projecting in the plane of the strip andprodncin g said barbs from corresponding notches thus cutin the edge ofthe other portion of the blank strip in so cutting said barbed striptherefrom; cutting slits n, lengthwise in the notched strip each wayfrom the bottoms of the notches, and bending the barbed spurs therebypartly separated from said notched strip laterally to said strip, andthereby producing the laterally projecting barbs thereon, allsubstantially as described.

2. The improvement in the art of making barbed fencing which consists ofcutting from the margin of a blank strip e, barbed strip a, having barbsb, at intervals along one edge projecting in the plane of the strip andproducing said barbs from corresponding notches thus cut in the edge ofthe other portion of the blank strip in so cutting the said barbed striptherefrom; cutting slits n, lengthwise in the notched strip each wayfrom the bottoms of the notches, trimming the curved edges andsharpening the points of the barb spurs thereby partly separated fromsaid notched strip, and bending said barb spurs laterally to the stripand thereby producing laterally projecting barbs thereon, allsubstantially as described.

3. The improvement in the art of making barbed fencing which consists ofcutting from the margin of a blank strip e, barbed strip a, having barbsb, at intervals along one edge projecting in the plane of the strip andproducing said barbs from corresponding notches thus cut on the edge ofthe other portion of the blank strip in so cutting the said barbed striptherefrom, cutting slits n, lengthwise on the notched strip each wayfrom the bottoms of the notches; cutting slits q, intermediate to slitsn, and bending the barb spurs partly cut from the notched striplaterally thereto and thereby producing the laterally projectin g barbsthereon, substantially as described.

4. The improvement in the art of making barbedfencing which consists ofcutting from each margin of a blank strip 6, barbed strip a, havingbarbs b, at intervals along one edge projecting in the plane of thestrip and producing said barbs from corresponding notches thus cut inthe edges of the other portion of said strip in so cutting said barbedstrips therefrom; cutting slits n, lengthwise in the notched strip eachway from the bottoms of the notches of .both edges; bending the barbspurs thereby partly cut from said notched strip laterally to saidstrip, and splitting said notched strip along the middle and separatingit into two barbed strips having laterally projecting barbs,substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

THOMAS v. ALLIs.

Witnesses:

W. J. MORGAN, W. B. EARLL.

